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Backup Priority

Offline Smitro

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Backup Priority
« on: May 11, 2010, 11:47:55 AM »
Hi all,

For some reason todays backup on my server nearly killed it. It ran out of processing power to be able to do anything else.

I'm wondering, is it possible to lower the priority of the backup, or even reduce it to only one processor, so everything else can still function?

My Box:
2 x Intel P3 1.2ghz processors
512mb of ram.
120gb HDD
(I'm waiting till SME 8 to upgrade the hardware).

I have errors in my logs like this:
Code: [Select]
May 11 11:35:37 box1 kernel: Free pages:       15228kB (0kB HighMem)
May 11 11:35:38 box1 kernel: Active:99202 inactive:11431 dirty:0 writeback:0 unstable:0 free:3807 slab:5037 mapped:112798 pagetables:4226
May 11 11:35:38 box1 kernel: DMA free:12500kB min:88kB low:176kB high:264kB active:0kB inactive:0kB present:16384kB pages_scanned:0 all_unreclaimable? yes
May 11 11:35:38 box1 kernel: protections[]: 0 0 0
May 11 11:35:39 box1 kernel: Normal free:2728kB min:2756kB low:5512kB high:8268kB active:396808kB inactive:45724kB present:507840kB pages_scanned:1224478 all_unreclaimable? yes
May 11 11:35:39 box1 kernel: protections[]: 0 0 0
May 11 11:35:40 box1 kernel: HighMem free:0kB min:128kB low:256kB high:384kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no
May 11 11:35:41 box1 kernel: protections[]: 0 0 0
May 11 11:35:41 box1 kernel: DMA: 5*4kB 4*8kB 2*16kB 2*32kB 3*64kB 3*128kB 2*256kB 0*512kB 1*1024kB 1*2048kB 2*4096kB = 12500kB
May 11 11:35:41 box1 kernel: Normal: 4*4kB 9*8kB 7*16kB 1*32kB 9*64kB 13*128kB 1*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 2728kB
May 11 11:35:42 box1 kernel: HighMem: empty
May 11 11:35:42 box1 kernel: 2275 pagecache pages
May 11 11:35:43 box1 kernel: Swap cache: add 22999623, delete 22998996, find 25382749/28357083, race 6+1199
May 11 11:35:49 box1 kernel: 0 bounce buffer pages
May 11 11:35:50 box1 kernel: Free swap:            0kB
May 11 11:35:52 box1 kernel: 131056 pages of RAM
May 11 11:35:53 box1 kernel: 0 pages of HIGHMEM
May 11 11:35:53 box1 kernel: 2470 reserved pages
May 11 11:35:54 box1 kernel: 7722 pages shared
May 11 11:35:54 box1 kernel: 627 pages swap cached
May 11 11:35:55 box1 kernel: Out of Memory: Killed process 18725 (mysqld).
May 11 11:35:56 box1 kernel: mysqld: page allocation failure. order:0, mode:0x1d2
May 11 11:35:57 box1 kernel:  [__alloc_pages+671/689] __alloc_pages+0x29f/0x2b1
May 11 11:35:57 box1 kernel:  [<c0145b5b>] __alloc_pages+0x29f/0x2b1
May 11 11:35:58 box1 kernel:  [do_page_cache_readahead+231/344] do_page_cache_readahead+0xe7/0x158
May 11 11:35:58 box1 kernel:  [<c0148193>] do_page_cache_readahead+0xe7/0x158
May 11 11:35:59 box1 kernel:  [filemap_nopage+359/770] filemap_nopage+0x167/0x302
May 11 11:35:59 box1 kernel:  [<c0142dd6>] filemap_nopage+0x167/0x302
May 11 11:36:00 box1 kernel:  [do_no_page+203/827] do_no_page+0xcb/0x33b
May 11 11:36:00 box1 kernel:  [<c0150651>] do_no_page+0xcb/0x33b
May 11 11:36:01 box1 kernel:  [handle_mm_fault+220/403] handle_mm_fault+0xdc/0x193
May 11 11:36:01 box1 kernel:  [<c0150a77>] handle_mm_fault+0xdc/0x193
May 11 11:36:02 box1 kernel:  [do_page_fault+430/1478] do_page_fault+0x1ae/0x5c6
May 11 11:36:03 box1 kernel:  [<c011b897>] do_page_fault+0x1ae/0x5c6
May 11 11:36:03 box1 kernel:  [fget+59/66] fget+0x3b/0x42
May 11 11:36:05 box1 kernel:  [<c015e28e>] fget+0x3b/0x42
May 11 11:36:06 box1 kernel:  [sys_setsockopt+92/137] sys_setsockopt+0x5c/0x89
May 11 11:36:07 box1 kernel:  [<c028163a>] sys_setsockopt+0x5c/0x89
May 11 11:36:09 box1 kernel:  [sys_setsockopt+128/137] sys_setsockopt+0x80/0x89
May 11 11:36:12 box1 kernel:  [<c028165e>] sys_setsockopt+0x80/0x89
May 11 11:36:14 box1 kernel:  [sys_socketcall+442/507] sys_socketcall+0x1ba/0x1fb
May 11 11:36:19 box1 kernel:  [<c0281cfb>] sys_socketcall+0x1ba/0x1fb
May 11 11:36:22 box1 kernel:  [do_page_fault+0/1478] do_page_fault+0x0/0x5c6
May 11 11:36:24 box1 kernel:  [<c011b6e9>] do_page_fault+0x0/0x5c6
May 11 11:36:25 box1 kernel:  [error_code+47/56] error_code+0x2f/0x38
May 11 11:36:26 box1 kernel:  [<c02de99b>] error_code+0x2f/0x38
May 11 11:36:26 box1 kernel: Mem-info:
May 11 11:36:27 box1 kernel: DMA per-cpu:
May 11 11:36:28 box1 kernel: cpu 0 hot: low 2, high 6, batch 1
May 11 11:36:28 box1 kernel: cpu 0 cold: low 0, high 2, batch 1
May 11 11:36:29 box1 kernel: cpu 1 hot: low 2, high 6, batch 1
May 11 11:36:29 box1 kernel: cpu 1 cold: low 0, high 2, batch 1
May 11 11:36:30 box1 kernel: Normal per-cpu:
May 11 11:36:30 box1 kernel: cpu 0 hot: low 32, high 96, batch 16
May 11 11:36:31 box1 kernel: cpu 0 cold: low 0, high 32, batch 16
May 11 11:36:31 box1 kernel: cpu 1 hot: low 32, high 96, batch 16
May 11 11:36:32 box1 kernel: cpu 1 cold: low 0, high 32, batch 16
May 11 11:36:33 box1 kernel: HighMem per-cpu: empty

Thanks in advance.
.........

Offline cactus

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Re: Backup Priority
« Reply #1 on: May 11, 2010, 11:54:23 AM »
Please do not report problems here, report them in the bugtracker. That is the only path changes will eventually be added to the product.

Please post a reference to the bug in this thread for future readers.

Thanks in advance.
Be careful whose advice you buy, but be patient with those who supply it. Advice is a form of nostalgia, dispensing it is a way of fishing the past from the disposal, wiping it off, painting over the ugly parts and recycling it for more than its worth ~ Baz Luhrmann - Everybody's Free (To Wear Sunscreen)

Offline Smitro

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Re: Backup Priority
« Reply #2 on: May 11, 2010, 11:59:33 AM »
Ok, sorry I didn't think it was a bug. I thought it just my machine wasn't up for the task and didn't want to waste the programmers time.

I'll be back with a number.
.........

Offline Smitro

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Re: Backup Priority
« Reply #3 on: May 11, 2010, 12:48:33 PM »
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